When it comes to mashups submitted to our directory, those helping users search for and discover new music consistently rank among the most popular. The number and variety of music services including metadata, social and streaming continues to grow and give developers more tools with which to build their apps. The list below includes some of the recent mashups of note.

"I felt like every mobile developer in the valley was probably talking about Parse that night," said James Yu, one of the company's founders. It was Yu's idea to invite potential technical employees to apply via API. The resulting interest from Hacker News prompted hundreds of applications, a copy-paste JavaScript solution and, potentially, a future Parse API application that's not quite as easy.

The WebCargo Domain Check API (also referred to as the Domain Availabily API) allows you to deeply probe a domains availability. The RESTful API also uses multiple methods to check an email addresses...